LTC3560 Datasheet | Linear Technology

Features n High Efficiency: Up to 95% n Low Output Ripple (<20m VP-P): Burst Mode® Operation: IQ = 16μA n 2.5V to 5.5V Input Voltage Range n 2.25MHz Constant Frequency Operation n Synchronizable to External Clock n No Schottky Diode Required n Stable with Ceramic Capacitors n Low Dropout Operation: 100% Duty Cycle n 0.6V Reference Allows Low Output Voltages n Shutdown Mode Draws < 1μA Supply Current n ±2% Output Voltage Accuracy n Current Mode Operation for Excellent Line and Load Transient Response n Overtemperature Protected n Low Profile (1mm) Thin SOT™ Package APPLICATIONS n Cellular Telephones n Wireless and DSL Modems n Digital Still Cameras n Media Players n Portable Instruments 2.25MHz, 800m A Synchronous Step-Down Regulator in Thin SOT DESCRIPTION The LTC®3560 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 16μA, dropping to <1μA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3560 ideally suited for single Li-Ion/Li-Polymer battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. Switching frequency is internally set at 2.25MHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications the LTC3560 can be externally synchronized from 1MHz to 3MHz. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled high, preventing low frequency ripple from interfering with audio circuitry. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3560 is available in a low profile (1mm) Thin SOT package. L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. All other trademarks...